Fukushima Medical University 4 articles published in JoVE Cancer Research High-Throughput In Vitro Assay using Patient-Derived Tumor Organoids Arisa Higa1, Nobuhiko Takahashi2,3, Gen Hiyama2, Hirosumi Tamura2, Hirotaka Hoshi2, Kenju Shimomura3, Shinya Watanabe2, Motoki Takagi2 1FUJIFILM Wako Bio Solutions Corporation, 2Medical-Industrial Translational Research Center, Fukushima Medical University, 3Department of Bioregulation and Pharmacological Medicine, Fukushima Medical University A highly accurate in vitro high-throughput assay system was developed to evaluate anticancer drugs using patient-derived tumor organoids (PDOs), similar to cancer tissues but are unsuitable for in vitro high-throughput assay systems with 96-well and 384-well plates. Medicine Generating a Murine Orthotopic Metastatic Breast Cancer Model and Performing Murine Radical Mastectomy Eriko Katsuta1, Masanori Oshi1, Omar M. Rashid2,3,4,5, Kazuaki Takabe1,6,7,8,9,10 1Breast Surgery, Department of Surgical Oncology, Roswell Park Comprehensive Cancer Center, 2Holy Cross Hospital Michael and Dianne Bienes Comprehensive Cancer Center, 3Department of Surgery, Massachusetts General Hospital, 4Department of Surgery, University of Miami Miller School of Medicine, 5Department of Surgery, Nova Southeastern University School of Medicine, 6Department of Surgery, University at Buffalo Jacobs School of Medicine and Biomedical Sciences, 7Department of Breast Surgery and Oncology, Tokyo Medical University, 8Department of Surgery, Yokohama City University, 9Department of Surgery, Niigata University Graduate School of Medical and Dental Sciences, 10Department of Surgery, Fukushima Medical University We introduce a murine orthotopic breast cancer model and radical mastectomy model with bioluminescence technology to quantify the tumor burden to mimic human breast cancer progression. Developmental Biology Visualization of Tangential Cell Migration in the Developing Chick Optic Tectum Yuji Watanabe1, Chie Sakuma1, Hiroyuki Yaginuma1 1Department of Neuroanatomy and Embryology, School of Medicine, Fukushima Medical University We describe the methods for fluorescent labeling of tangentially migrating cells by electroporation, and for time-lapse imaging of the labeled cell movement in a flat-mount culture in order to visualize migrating cell behavior in the developing chick optic tectum. Behavior Recording Horizontal Saccade Performances Accurately in Neurological Patients Using Electro-oculogram Yasuo Terao1, Hideki Fukuda2, Yusuke Sugiyama3, Satomi Inomata-Terada1, Shin-ichi Tokushige4, Masashi Hamada3, Yoshikazu Ugawa5 1Department of Cell Physiology, Kyorin University, 2Segawa Memorial Neurological Clinic for Children, 3Department of Neurology, University of Tokyo, 4Department of Neurology, Kyorin University, 5Department of Neurology, Fukushima Medical University The article describes a practical method for recording horizontal eye movements with high accuracy by electro-oculogram in neurological patients, using a cup Ag-AgCl electrode with a wide plastic fringe. Stable measurement requires proper selection and fixation of electrodes, taking sufficient time for light adaptation to occur, and re-calibration as needed.